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authorBenjamin Dobell <benjamin.dobell@glassechidna.com.au>2011-07-17 11:50:07 +0200
committerBenjamin Dobell <benjamin.dobell@glassechidna.com.au>2011-07-17 11:50:07 +0200
commit8cb7f6ee8f872938e257541c07d0e4b2ad0e3f35 (patch)
tree7b40d7e1a5c28b2e05b01cd9e348aabd60f2d19c /libusb-1.0/libusb/os/threads_windows.c
parentAltered the user interface slightly to prevent clipping on certain OS. (diff)
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Diffstat (limited to 'libusb-1.0/libusb/os/threads_windows.c')
-rw-r--r--libusb-1.0/libusb/os/threads_windows.c221
1 files changed, 0 insertions, 221 deletions
diff --git a/libusb-1.0/libusb/os/threads_windows.c b/libusb-1.0/libusb/os/threads_windows.c
deleted file mode 100644
index fe84ec0..0000000
--- a/libusb-1.0/libusb/os/threads_windows.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * libusb synchronization on Microsoft Windows
- *
- * Copyright (C) 2010 Michael Plante <michael.plante@gmail.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <config.h>
-#include <objbase.h>
-#include <errno.h>
-#include <stdarg.h>
-
-#include "libusbi.h"
-
-// Workaround for MinGW-w64 multilib bug
-#if defined(_MSC_VER) || defined(_WIN64)
-#define INIT_INTERLOCKEDEXCHANGE
-#define pInterlockedExchange InterlockedExchange
-#else
-static LONG (WINAPI *pInterlockedExchange)(LONG volatile *, LONG) = NULL;
-#define INIT_INTERLOCKEDEXCHANGE if (pInterlockedExchange == NULL) { \
- pInterlockedExchange = (LONG (WINAPI *)(LONG volatile *, LONG)) \
- GetProcAddress(GetModuleHandle("KERNEL32"), "InterlockedExchange"); \
- if (pInterlockedExchange == NULL) return ((errno=ENOENT)); \
- }
-#endif
-
-int usbi_mutex_init(usbi_mutex_t *mutex,
- const usbi_mutexattr_t *attr) {
- if(! mutex) return ((errno=EINVAL));
- *mutex = CreateMutex(NULL, FALSE, NULL);
- if(!*mutex) return ((errno=ENOMEM));
- return 0;
-}
-int usbi_mutex_destroy(usbi_mutex_t *mutex) {
- // It is not clear if CloseHandle failure is due to failure to unlock.
- // If so, this should be errno=EBUSY.
- if(!mutex || !CloseHandle(*mutex)) return ((errno=EINVAL));
- *mutex = NULL;
- return 0;
-}
-int usbi_mutex_trylock(usbi_mutex_t *mutex) {
- DWORD result;
- if(!mutex) return ((errno=EINVAL));
- result = WaitForSingleObject(*mutex, 0);
- if(result == WAIT_OBJECT_0 || result == WAIT_ABANDONED)
- return 0; // acquired (ToDo: check that abandoned is ok)
- if(result == WAIT_TIMEOUT)
- return ((errno=EBUSY));
- return ((errno=EINVAL)); // don't know how this would happen
- // so don't know proper errno
-}
-int usbi_mutex_lock(usbi_mutex_t *mutex) {
- DWORD result;
- if(!mutex) return ((errno=EINVAL));
- result = WaitForSingleObject(*mutex, INFINITE);
- if(result == WAIT_OBJECT_0 || result == WAIT_ABANDONED)
- return 0; // acquired (ToDo: check that abandoned is ok)
- return ((errno=EINVAL)); // don't know how this would happen
- // so don't know proper errno
-}
-int usbi_mutex_unlock(usbi_mutex_t *mutex) {
- if(!mutex) return ((errno=EINVAL));
- if(!ReleaseMutex(*mutex)) return ((errno=EPERM ));
- return 0;
-}
-
-int usbi_mutex_static_lock(usbi_mutex_static_t *mutex) {
- if(!mutex) return ((errno=EINVAL));
- INIT_INTERLOCKEDEXCHANGE;
- while (pInterlockedExchange((LONG *)mutex, 1) == 1) {
- SleepEx(0, TRUE);
- }
- return 0;
-}
-int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex) {
- if(!mutex) return ((errno=EINVAL));
- *mutex = 0;
- return 0;
-}
-
-
-
-int usbi_cond_init(usbi_cond_t *cond,
- const usbi_condattr_t *attr) {
- if(!cond) return ((errno=EINVAL));
- list_init(&cond->waiters );
- list_init(&cond->not_waiting);
- return 0;
-}
-int usbi_cond_destroy(usbi_cond_t *cond) {
- // This assumes no one is using this anymore. The check MAY NOT BE safe.
- struct usbi_cond_perthread *pos, *prev_pos = NULL;
- if(!cond) return ((errno=EINVAL));
- if(!list_empty(&cond->waiters)) return ((errno=EBUSY )); // (!see above!)
- list_for_each_entry(pos, &cond->not_waiting, list, struct usbi_cond_perthread) {
- free(prev_pos);
- list_del(&pos->list);
- prev_pos = pos;
- }
- free(prev_pos);
- prev_pos = pos = NULL;
-
- return 0;
-}
-
-int usbi_cond_broadcast(usbi_cond_t *cond) {
- // Assumes mutex is locked; this is not in keeping with POSIX spec, but
- // libusb does this anyway, so we simplify by not adding more sync
- // primitives to the CV definition!
- int fail = 0;
- struct usbi_cond_perthread *pos;
- if(!cond) return ((errno=EINVAL));
- list_for_each_entry(pos, &cond->waiters, list, struct usbi_cond_perthread) {
- if(!SetEvent(pos->event))
- fail = 1;
- }
- // The wait function will remove its respective item from the list.
- return fail ? ((errno=EINVAL)) : 0;
-}
-int usbi_cond_signal(usbi_cond_t *cond) {
- // Assumes mutex is locked; this is not in keeping with POSIX spec, but
- // libusb does this anyway, so we simplify by not adding more sync
- // primitives to the CV definition!
- struct usbi_cond_perthread *pos;
- if(!cond) return ((errno=EINVAL));
- if(list_empty(&cond->waiters)) return 0; // no one to wakeup.
- pos = list_entry(&cond->waiters.next, struct usbi_cond_perthread, list);
- // The wait function will remove its respective item from the list.
- return SetEvent(pos->event) ? 0 : ((errno=EINVAL));
-}
-static int __inline usbi_cond_intwait(usbi_cond_t *cond,
- usbi_mutex_t *mutex,
- DWORD timeout_ms) {
- struct usbi_cond_perthread *pos;
- int found = 0, r;
- DWORD r2,tid = GetCurrentThreadId();
- if(!cond || !mutex) return ((errno=EINVAL));
- list_for_each_entry(pos, &cond->not_waiting, list, struct usbi_cond_perthread) {
- if(tid == pos->tid) {
- found = 1;
- break;
- }
- }
- if(!found) {
- pos = malloc(sizeof(struct usbi_cond_perthread));
- if(!pos) return ((errno=ENOMEM)); // This errno is not POSIX-allowed.
- pos->tid = tid;
- pos->event = CreateEvent(NULL, FALSE, FALSE, NULL); // auto-reset.
- if(!pos->event) {
- free(pos);
- return ((errno=ENOMEM));
- }
- list_add(&pos->list, &cond->not_waiting);
- }
-
- list_del(&pos->list); // remove from not_waiting list.
- list_add(&pos->list, &cond->waiters);
-
- r = usbi_mutex_unlock(mutex);
- if(r) return r;
- r2 = WaitForSingleObject(pos->event, timeout_ms);
- r = usbi_mutex_lock(mutex);
- if(r) return r;
-
- list_del(&pos->list);
- list_add(&pos->list, &cond->not_waiting);
-
- if(r2 == WAIT_TIMEOUT) return ((errno=ETIMEDOUT));
-
- return 0;
-}
-// N.B.: usbi_cond_*wait() can also return ENOMEM, even though pthread_cond_*wait cannot!
-int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex) {
- return usbi_cond_intwait(cond, mutex, INFINITE);
-}
-int usbi_cond_timedwait(usbi_cond_t *cond,
- usbi_mutex_t *mutex,
- const struct timespec *abstime) {
- FILETIME filetime;
- ULARGE_INTEGER rtime;
- struct timeval targ_time, cur_time, delta_time;
- struct timespec cur_time_ns;
- DWORD millis;
- extern const uint64_t epoch_time;
-
- GetSystemTimeAsFileTime(&filetime);
- rtime.LowPart = filetime.dwLowDateTime;
- rtime.HighPart = filetime.dwHighDateTime;
- rtime.QuadPart -= epoch_time;
- cur_time_ns.tv_sec = (long)(rtime.QuadPart / 10000000);
- cur_time_ns.tv_nsec = (long)((rtime.QuadPart % 10000000)*100);
- TIMESPEC_TO_TIMEVAL(&cur_time, &cur_time_ns);
-
- TIMESPEC_TO_TIMEVAL(&targ_time, abstime);
- timersub(&targ_time, &cur_time, &delta_time);
- if(delta_time.tv_sec < 0) // abstime already passed?
- millis = 0;
- else {
- millis = delta_time.tv_usec/1000;
- millis += delta_time.tv_sec *1000;
- if (delta_time.tv_usec % 1000) // round up to next millisecond
- millis++;
- }
-
- return usbi_cond_intwait(cond, mutex, millis);
-}
-